Fountain-pen.



H. G. CRAIG.

FOUNTAIN PEN.'

APPLICATION man SEPT. 23. 1915.

HARVEY GREEN CRAIG, OF KANSAS CITY, MISSOURI, ASSIGNOR TO KRAKER .PEN CO., OF KANSAS CITY, MISSOURL'A CORPORATION OF MISSOURI'.

FOUNTAIN-PEN.

Patented AuO. 21, 1917.

Original application lel April 9, 1914, Serial No. 830,636. Divided and this application filed. September i citizen of the United vStates, residing `at Kansas City, in the county of Jackson and State of Missouri, have invented certain nen7 and useful Improvements in Fountain- Pens; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to rWhich it appertains to make and use the same.

This invention relates to improvements in fountain pens and more particularly7 to selffilling fountain pens equipped with collapsible ink-sacks. y

Fountain pens of this class are equipped with so-called p slip sections Which re'- ceive the pen point and feed device and to which the collapsible ink-sacks are secured, 'said sections fitting telescopically in the mouths of the casings or barrels containing the ink-sacks and the mechanism for collapsing thesame. The said slip-sections are ytted relatively snugly in. the mouths of the fountain pen barrels and are held in place therein solely by friction.

Fountain pen barrels, pen-sections and caps are most generally made of hard rub- 1 berl and, as is Well-known, this material expands under the influence of even mild heat. It, therefore', very commonly occurs that under the influence of summer heat, the heat of the hand in Writing With the fountain pen, and by exposure to the suns rays in show-Windows in which fountain pens are displayed, the barrel or casing of the pen expands to such an extent as to leave the pen section only relatively loosely engaged therein thus causing it to drop out or to interfere with the operation of the pen in Writing. This trouble can only be remedied by proper repairs and is the cause of considerable trouble to manufacturers and dealers as Well as users,vit being frequently necessary to return a Whole stock of fountain pens to the manufacturers for such repairs especially if such stock has remained in the dealers hands through a period of very hot Weather.

In this type of fountain pens another difficulty met With is that in inserting the slipsection and collapsible sack into the barrel,

the operator will naturally relatively rotate the barrel and slip sectionI thereby Serial No. 52,304.

tivistingthe sack and materially reducing its ink-containing capacity. The sacks are generally as large in diameter as the barrel will permit in order that the pen may have the maximum ink-capacity for the diameter of the barrel and as the sack-collapsing` means contained in the barrel generally slightly crowd the sack, it Will be readily seen that the resumption of the normal shape of the'tvvisted sack is resisted 'so that it Will remain in this twisted or distorted shape and, unless removed and carefully reinserted Within a short time, said sack Will become set, that is,'permanently retain its distorted shape.

The main object of my present invention is to proifideafountain pen barrel equipped at its mouth or pen-section receiving end, with means for preventing enlargement of said mouth portion to an extent sufficient to render the said pen-section of the telescopi cally interfitting type from becoming loose therein.

A further object vof the invention is to provide means accomplishing the foregoing object which also strengthen and reinforce the mouth of the barrel.

Another object of the invention is to provide a fountain pen barrel and pen section adapted to fit telescopically therein provided With interengaging formations for preventing relative rotation thereof Whereby to prevent twisting of the collapsible ink-sack While inserting the pensection in the barrel mouth.

A suitable embodiment of the invention is illustrated in the accompanying drawings in vvhich- Figure 1 is a fragmentary central longitudinal section of a fountain pen constructed in accordance with the invent-ion.

Fig. -2- is a similar sectional view at right angles to that shown in Fig. 1- and showing the pen-section in elevation.

Fig. -3- is a transverse section of the same on the line 3-3 of Fig. -1.

Fig. 4.- is a detail perspective vievv of the reinforcing ring employed.

The present invention is substantially identical with that described and claimed in my pending application for patentfor improvements in fountain pens, tiled April 9, 1914, Serial Number 830,636, of which the present application is a division in so far as it disclosesl the same subject-matter as is disclosed iny the aforesaid application.

My invention. consists in embodying in; themouth of the fountain barrel l a metal ring 2, preferably of copper7 brass or other metal which is affected by the sulfur of the rubber during vulcaniZa-tionof theV latter to oxidize the surface of said ring and cause to get a. firm hold on the rubber. The said ln ,the manufacture of fountain, p e'ns,y the w all ofthetubing of which the barrel is made is renderedrelatively very thick and issubsequently bored out. and turned off externally to the desired thickness of barrel wall. rlhus in the raw stock the rings 2 i are completely embeddedl in the rubber and in boring the same a thin film of rubber is usually left on the inner face of the ring sov that the l ugs or projections filling the perforations cannot be withdrawn from the latter by expansion lof the barrel mouth, the loosening of the latter from the outer face of the ring being further prevented by the adhesion between ring and barrel caused by the action of the sulfur on the metal, so that the ring becomes inseparably connected with the barrel as to limit expansion and contraction of the part of the latter in which the ring is lembedded to the degree of expansion and contraction of said ring under variations in temperature.

The smooth cylindrical end portion A of the pen section 5 is ,turned to snugly fitthe mouth yof the :barrel and I have found that in practice said pen-section never becomes loose. t y

rkThe ring 2 is further provided with an inwardly projecting longitudinal rib 6 formed by indenting the outer face thereof to provide a longitudinal recess 7 therein which is also filled with rubber duringvulcanization and adds to the rigidity of the connection between the ring and the barrel. The said rib G'is'preferably of less length than the ring but may be of any length up to the full length'thereof. This rib is adapted to enter the longitudinal groove 8 in the said smooth vportion 4S of the" pen-` se'ctibn 5 thus" mouth and the material of the latterfilling said recesses for holding ysaid ring rigid therewith. Y

2. A fountain pen barrel adapted to telescopically receive a pensection and having a metallic reinforcing` ring embedded in the mouth vportion receiving said pen-section said ring rigid v .iithsaid barrel mouth and a pen. section having a longitudinal groove therein and adapted to be telescopically 'received in the mouth of barrel, said 'ring equipped with 'an inwardly extending proj ection adapted to enter the longitudinal groove in the pen-section for preventing rotation of the latter relatively to the barrel.

In testimony whereof I have signed my name in presence of two subscribing witnesses.

, HARVEY GREEN CRAIG.

lVitnesses:

LR. GATES, JOI-nv W.' VVEBs'rER.

Copies lof `thispatent*mal-y beiobtaneil for fire L.cents each, addressing the "fdih'iiiissiner joi wPaten'ts,

Washington, D. C. 

